Alarm signal



Dec. 3, 1929.- A. SHERWOOD ALARM S I GNAL Filed Aug 6, 1928 ill/Vivi,

SherWo od Ink? e s-tar Agnes Patented Dec. 3, 1929 PATENT OFFICE AGNES SHERWOOD, OF MASSILLON, OHIO ALARM SIGNAL Application filed August 6,1928. Serial No. 297,688.

My invention relates to alarm signals, and more particularly to alarm signals for use on automobiles, and the principal object of my invention is to provide a new and improved device of this type.

Sometimes when starting an automobile the driver, through inadvertence, neglects to release the hand brake before the automobile is under way, and in many instances continues 19 to drive a considerable distance with the hand brake set. The driver usually is unapprised of such a condition, until he seeks to investi-' gate the cause of the failure of the automobile to attain a proper speed, or until the odor 15 of burning brake bands warns him of such condition. Devices have been proposed to warn the driver that the hand brake has not been released, but these are not entirely satisfactory, since it is customary to use either a 20 ,combination where the circuit is closed whenever the hand brake is on and the clutch depressed, and consequently a combination .Where children playing in the car can sound the alarm, a most undesirable condition,-or

a combination where the only switch in circuit with the handbrake switch is the ignition switch, and consequently a combination where any use of the hand brake while the ignition is on, as on a long hill to relieve the service 30 brake, will sound the alarm, again a most un desirable condition. Applicants invention avoids these objections and provides a simple and effective manner of warning the driver that the hand brake is in brake-on position by causing a buzzer to sound whenever, after turning on the ignition switch, the clutch is depressed while the hand brake is still in brake-on position. It will be noticed that ap- 4 plicants invention causes the alarm signal to under way that the brake is in brake-on position.

In the drawings accompanying this specification and forming a part of this application I have shown, for the purposes of illustration, one form which my invention may assume, and in these drawings:

Figure 1 is a phantom view of an automobile showing the embodiment of my inven- 50 tion, while j apprise the driver before the automobile is Figure 2 shows parts of the automobile and the wiring of my invention drawn on a larger scale.

I show my invention as applied to an automobile 11 having an ordinary ignition switch 12 positioned on a dash board 18, connectedby a conductor 42 to a suitable source of current (not shown), and having a key 13 for controlling the flow of current to the ignition conductor 43 from a terminal 14 on the ignition switch 12.

A buzzer 15 provided with terminals 16 and 17 is attached to the motor-side of a dash board 18, the terminal 16 being connected to a conductor 41 providing a ground contact, and the terminal 17 being connected to a conductor 19. On the clutch pedal 20 is secured a clip 21 provided with an aperture 22 having secured therein one end of a wire 23 the other end of which is secured in an aperture 24 in an arm 25 of a spring switch 26 attached to the bottom side of the floor board 40 of the automobile 11. On a hand brake lever 30 a clip 31 is provided with an aperture 32 having secured therein one end of a wire 33 the other end of which is secured in an aperture 34 in an arm 35 of a spring switch 36 attached to the bottom side of the floor board 4.0 of the automobile 11. The conductor 19 leading from the terminal 17 of the buzzer 15 is attached to a terminal 27 on the spring switch 26 while a conductor 28 leads from a second terminal 29 on the spring switch 26 to a terminal 37 of the spring switch 36 and a conductor 39 leads from a second terminal 38 on the spring switch 36 to the terminal 14 of the ignition switch 12.

The spring switch 26 is so positioned and adjusted in cooperation with the clutch pedal 20 that only when the clutch pedal 20 is depressed are the terminals 27 and29 connected, and the spring switch 36 is so posi- '30 stood that the disclosure herein is illustrative from brake-on circuit between t turned on, no current will pass from the ignition switch 12 to operate the buzzer 15." It will also ,be'a parent that when such an arrangement 0 the-various parts exists the degressing of the clutch pedal 20 will establis a circuit between the switch 12' and the buzzer 15 causing the .bIlZZGr'tO sound warnmg that the brake lever should be released buzzer 15 and ther causing the buzzer 15 to cease operating. 7

Under these circumstances those skilled in I the art will realize that I have produced a new and im roved alarm signal, and accord-,

ingly that have accomplished at least the pnnci al object of .my' invention. ,At the same t1me those skilledin the art will realize that the particular application of my invention herein shown nd describedembodies advantages other t an 'th se specifically pointed out or sug este'd here and also that this articular em diment of my invention may e variously changed and modified without departin from thes irit of myv invention or sacri cin these a vantages, also that my invention, an the particular embodiment thereof herein-disclosed, are adaptable to and have uses other than those described or sug- 'gested herein, and it vtherefore .will be underonly, and that my invention is not limited,

thereto.

Iclaim; p An alarm signal, for use on an automobile havinga brake lever and a clutch pedal and a source of current and an ignition switch,

comprising: a signal meaiis for-giving an alarm; a brake-switch controlle b said hand brake lever and closed when sai hand brake lever is in brake-on position; a clutchswitch controlled by said clutch pedal and closed when said clutch pedal is in clutch-out position; and conductors connecting said signal means and said brake-switch and said clutch switch and saidignition switch to said 7 source of current in series.- In testimony whereof I hereunto aflixmy signature. v

'- ism SHERWOOD.

position this breaking the e ignition'witch 12 and the 

